I've seen different theories on how mod should treat negative divisors, but
I've never seen that "solution".
On Tue, Feb 10, 2009 at 4:30 PM, Chouser <chou...@gmail.com> wrote:
>
> Is 'mod' working correctly?
>
> user=> (map #(mod % 3) (range -9 9))
> (3 1 2 3 1 2 3 1 2 0 1 2 0 1 2 0 1 2)
>
> It disagrees with, for example, Ruby:
>
> irb(main):002:0> (-9..9).map{|x| x % 3}
> => [0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0]
>
> And python:
>
> >>> map( lambda x: x % 3, range(-9,9) )
> [0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2]
>
> --Chouser
>
> >
>
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